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comparison mncc/mncc_sock.c @ 2:053f04687106

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mncc: initial import from old ThemWi
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 08 Jun 2024 23:12:12 +0000
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1:b161dbfffdaa 2:053f04687106
1 /*
2 * In this module we implement low-level handling
3 * of the main MNCC socket that connects to OsmoMSC.
4 */
5
6 #include <sys/types.h>
7 #include <sys/socket.h>
8 #include <sys/un.h>
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <stdlib.h>
12 #include <syslog.h>
13 #include "../include/mncc.h"
14
15 static char mncc_socket_pathname[] = "/var/gsm/mncc_socket";
16
17 int mncc_socket;
18
19 open_mncc_socket()
20 {
21 struct sockaddr_un sa;
22 unsigned sa_len;
23 int rc;
24
25 mncc_socket = socket(AF_UNIX, SOCK_SEQPACKET, 0);
26 if (mncc_socket < 0) {
27 syslog(LOG_CRIT, "socket(AF_UNIX, SOCK_SEQPACKET, 0): %m");
28 return(-1);
29 }
30 fill_sockaddr_un(mncc_socket_pathname, &sa, &sa_len);
31 rc = connect(mncc_socket, (struct sockaddr *) &sa, sa_len);
32 if (rc < 0) {
33 syslog(LOG_ERR, "connect to %s: %m", mncc_socket_pathname);
34 return(-1);
35 }
36 update_max_fd(mncc_socket);
37 return(0);
38 }
39
40 void
41 mncc_socket_select()
42 {
43 union mncc_msg msg;
44 int rc;
45
46 rc = recv(mncc_socket, &msg, sizeof msg, 0);
47 if (rc < 0) {
48 syslog(LOG_CRIT, "error reading from MNCC socket: %m");
49 exit(1);
50 }
51 if (rc < 4) {
52 syslog(LOG_CRIT, "short read from MNCC socket: %d bytes", rc);
53 exit(1);
54 }
55 mncc_msg_from_gsm(&msg, rc);
56 }
57
58 send_mncc_to_gsm(msg, msglen)
59 union mncc_msg *msg;
60 unsigned msglen;
61 {
62 return send(mncc_socket, msg, msglen, 0);
63 }